Reflecting-lamp.



H. A. DQUGLAS REFLECTING LAMP. APRLICATIQN HLEU res. I9. lau.

Patented Apr. 9, 1918.

UNITED sTATEs PATENT OFFICE.

HARRY A. DOUGLAS, OF BRONSON, MICHIGAN, ASSIGNOR T0 DOUGLAS & RUDD MFG.CO., 0F BRONSON, MICHIGAN, A CORPORATION 0F MICHIGAN4 REFLECTING-LAMP.

Application filed February 19, 1917.

To all wlw/1L 'it may concern.'

Be it known that l. llamar Doiiums, citizen ot' the United States,residin at Bronson, in the county of lil-anch and tato of Michigan, hareinvented a certain new and useful Improvement in Refiecting- Lamps` ofwhich the Following is a full, cleat'. concise. and exact deseri ition.

My invention relates to rcfiecting lamps, some features of thein\'ention being ot' particular utilityr in eoniiection with electriclamps. The invention has for its object the provision of improvedmechanism whereby the light` lsource. ot' the lamp may be adjllsted inand out with respect to the retlector land where the intention isembraced in an electric lamp l also provide improved means for switchingthe lamp in and out of circuit. The mechanism that is employed foradjusting the light source such as a lamp bulb and the mechanism whichis ernployed for switching the lamp into and out of circuit' preferablyincludes operating parts that are common thereto.

My invention in its various aspects will vvloe fullyexplaintal inconnection with the accompanying drawing and will he defined in theclaims. In the drawing, which shows the preferred emliodimeutof theinvention as employed in electric lamps, Figure. V1 is a side elevation,partiallyY in section, of a reecting lamp eontainiing features of myinvention; Fig. '2 is a longitudinal View, partiallytin section audpartially in elevation, of portions of the structure illustrated in Fig.1; Fig. 3 is a view on line. 3 3 of Fig.

6; Fig. 4 is a `.Tiewon line 4-4 of Fig. 2;

Fig. 5 is a view on line ."i-fi of Fig. 2;*and Fig. 6 is a View on line6-6 of Fig. 2.

Like parts are indicated by similar characters ofreferenc-e throughoutthe different; figures.

The concave reflector 1 is received intlio reflector carrying concavecasing 2 here shown as distinct and spaced apart from the reflector, butto which construction the iu vention is not. to be limited. Vhen theseelements 1 and 2 are separate they are coupled in any suitable Way,leaving a space intervening between the reflector and casing. Thereector includes a rearwardly extending tubular colninuatnion 3 in fixedrelation with the balance of the reflector, this continuationconstituting a holder or mounting. A spring tongue 4 is integrallyformed with Specification ot Letters PatentA rau-.lined Apr. 9, 1918.

serial Nu. 149,665.

t projecting therefrom which is narrower" than the, balance ot' thetongue and is slightly narrower than a slot 7 in the holder 5t wherebythis portion may project into tbe slot to'prerent the. shell fromturning with respect to the slot. while at the saine time the .siden'iafrgins of the tongue 4 are adapted to press against` the sidemargins of the slot` 7. The tongue thus presses upon a surface olA theholder i3 and. where there is but one tongue` forces the .shell towardthe opposite side oi the holder wherebyl the Ishell is held inengagement with the holder 3. The slot T is elongated-so that the shell5 may be moved back and forth in its holder 3 whereby in the structureillustrated the position of the lamp bulb 8 which is carried by theforward end of thc shell in front of the reflector may be adjusted withrespect to the retlector. 'Ihe base 9 ot the lamp bulb 8 constituteslthe forward Contact carrier and as the arrangement illustrated is adouble pole arrangement this contactcarrier 9 carries two rear contactsltl and 11. The lamp base or contact carrier St is provided with bayonetpins` 12 engageable within bayonet seats 13 constituting parts ofbayonet slots 14. The rear contact carrying plug 15 within the easing 2is provided with terminal blocks 16 lmving binding .screws 17 hy, .whichcircuit. wires may be secured to the terminal blocks.

These terminal blocks are cylindrical and the forward ends thereof aretubular, springs 18 being included in the tubular p0rtions of thcterminal blocks and operating to press contacts 19, 20 forwardly intoengagement,` with the contacts 10 and 11,.all of these contacts beingWithin the casing. 'Ihe springs 18 and the contacts 19 and 20 thus not.only serve to establish circuit for the lamp but also operate to holdthe lamp base. 9 in bayonet pin and slot connection with the shell 8....a

The plug 15 is rotatable Within thc-rear end of the shell 5 in orderthat it may perform its switching function and when thus movably mountedit is provided with bayonet pins 21 and which are receivable inalternate bayonet seats 22, 23, shown in Fi 2 and 3, the, plug beinginserted from te front end of the shell with its )ins passing along the`bayonetslots 14 until1 they are in the zone that includes the bayonetseats 22, 23 whereafter the base of the lamp bulb is inserted in theshell with its ins- 12 placed in the bayonet seats 13. 'l e springs 1Hthus not only serve to hold the bayonet pins 12 in the seats but alsoserve to hold the bayonet pins 21 in the seats to which they areadjusted.

lt will be observed that the complemental switching contacts 10 and 19are eccentric with respect to the shell as are also the coinplcmentalswitching contacts 11 and 20 so that as the plug is turned thesecontacts are either brought ,into engagement or are separated according"to the direction ot' movementof theswitching plug 15. When the lamp isin open circuit the contacts 1t) and 20 are pressedagainst theinsulating portions of the lamp base that are adjacent the contacts10fantt 11, the springs 18 continuing to press the contacts 19 and l0forwardly to maintain the bayonet pins upon the switching plug and uponthe lamp hase. in the their respective bayonet seats. t The. shell andthe parts within it are in front oi the casing 2 and in order that theswitching plug 15 may be turned `or otherwise, moved with respect to thelamp base to cut the lamp in and out of circuit I employ a inotiontransinittingli)r connection, preferably in the form of a switching rod21, which is conr nected at its inner end with the switching plug andwhich is oierable from the exterior of the casing. lie outer end olthisl switching rod d sirably has a gripping head piece 25 assembledtherewith. 'lhe head iece 25 has an insert 26 which has a square ore.The outer end of the rod 24 is correspondin ly sqnareso that the rod maybe moved ongitudinnlly with respect to the head piece but will turntherewith. corners of the square end of the rod are threaded and have.threaded engagement with the threaded bore of the sleeve 27. This-sleeveis received within a cylindrical seat 4formed in the. guter end of thehead piece 25. The spring 27 engages the )lug 15 at one end and theinner surface-od the handle V21 at the other end and operates to holdthe sleeve in engagement with the head piece and, through theintermediation of tho sleeve, the spring operates to hold the head piecein enga' ement with the back end of the handle 2. y this arrangementli'otli the head piece and the sleeve areconlined in a single plano ofrotation whereby the former may alone cut the lamp in and out of circuitand the latter may alone move the shell and the lamp bulb in and out,the sleeve being rotatable with respect to the head piece. Theparticular form of lam illustrated is what is known as a spot light butto which form ,of lamp the invention is not to be limited. When the lampis in the form of a s ot light the back element is provided wit`a'handle 21 and this handle I preferably constitute a rearwardcontinuation of the casing, the switching rod 24 passing throu h thehandle to a oint where it is operable rom the exterior o the c'asing.

Any suitable means may be employed for establishing circuit relationbetween the contacts upon the plu 15 and the external source 'ofcurrent, t; ere being 'illustrated a well known form of connector 151which may be employed for this purpose.

Certain features'of novelty herein 'flisclosed are claimed 1n myco-pending`appli catipn Serial N o. 149,664, filed February 19, 191

lVhile I have herein shown andparticu lai-ly described the preferredembodiment of my invention I do not wish to be limited to the precisedetails ot' construction shown as changes may readily be made withoutdeparting from the s )irit of inyiinvention, but havingr thus describedmy invention I claim as new and desire to secure by Letters Patent thefollowingz- 1. In a retiectinggl electric lamp, the combination with aieliector carryingr casing; of an electric lamp bulb; a shell carryingthe lamp bulb at its front end and having bayo net pin and slotconnection with the base of the lamp bulb; ecccntrieally disposedswitclr iin: contacts within the casing for cutting the lamp in and outof circuit; a plug 'Within the casingr and mounted to turn in the shellto have alternative positions to cut the lamp in and out of circuit andhaving bayonet pin and slot engagement with the shell in the alternativepositions of the plug; a rod extending from said plug and operable fromthe exterior of the casinf: for turning the plug; spring means for hoding aid contacts in engagementto establish circuit und operating tohold the plug in circuit openin and circuit closing positions; a headpiece or the rod and en aged with the easing to confine it to a sing eplane of rotation, said rod being movable 'longitudinallyand with(respect to lthe he'ad piece and turning with the head iece in its v:icas positions with respect t creto; a rotatable sleeve in threadedengagement with the rod;

and a spring for maintaining the sleeve in t engagement with the headpiece.

2. In a reflecting electric lamp, the combination with si reflectorcarrying casing; of an electric lamp bulb; a shell carrying the lampbulb at its front end; a contact carrying plu r within the casing andcoupled with the shell for supplying current to the lamp and mounted toturn with respect to the shell to cut the lamp in and out of circuit,there being engageable eccentrically located switching contacts in thelamp circuit,. one upon the plug; a motion-transmitting rod extendingfrom the pln'; and ope ible from and n spring for maintaining thesleevein engagement with the head` iieee.

3. in a relieeting niectrie amp. the eonihination with a reflectorcarrying' easing; of an Aeleetri(` lamplbulb; a shell earrlyiiier thelamp bulb at its front end und having bajo net in and slot connectionwith the base of the ainp hull); ereentrieaiiydisposedswitei1 ingeontaets within th/e raving for cutting the lainp iu and out oi`eil-enit; n ping within the ensing' and mounted to turn in the shell tolia-re alternative positions to ent the laulp in and out of cil-ruit andhavingl hayonet pin and' slot engagement with the shell iu th'Ialternative positions ot' the plug: u rofl e.\'tenrlin;r-fron| said plugand operable from 'thia exterior of the easing for yturning the plug;.spring means for holding said eruitaets in engagement' to eslahlishrireuit and operating;1r to hold the ping in eircnit opt-nin;r andcircuit rinsing positions: a heud pier-e for the rod and engaged withthe easin; r to confine it to n single pinne-ul' rntation. lsaid rodheini;l movable longitndinally and with respeet to the heini piece andtn ruilu.Ir with the head piece inl its various positionsJ with respectthereto a rotatable sleeve in threaded engagement with the rod; and aspi-ingr t'or maintain'ingthe sleevel in confinement with the head pieceand for maintaining the `head` )ieee in engagement, with the rasinerthrong the interinwiiation ol' the sleeve n.lherehy the sleeve and headpiece' are prevented from moving bark and forth.

4. Tn a reliectinlgr electric lamp, the combination with a reflectorcarrying: casing; of 'an 'eier-trie lamp huih; a. shell eairrying` thelump huih at, its 'front end; a contact carryin; r piu.;r within theeasing and coli-pied with the shell for snpplyng current, to the lamp:1nd mounted to turn with inspect to the shell to eut the lainp in andout, of circuit, there tiring engngreahie eceentrir-,aily iorateflswitching eontaets in `the lamp eireuit. one upon the plug; amotion-transmitting rod extendingr from tinI pill;r und operable fromthe exterior of the, easing to turn said plug: a head pir-re tortillerod and engaged with the casiin;r io eorilineit to a sin'grle piane ofrotation, suifl rod being r ovahle loiuritudiL nelly and with respectto'the'head piece sind turning with the head piece. in its `vrtriouspositions with respect; thereto; a rotatable Sleeve in threadedengagement with the rod; and a spring for maintaining the sleeve in`trie lninp lullh;

"ol' an eleel'rie lulu engagement ivitlr the head piece and formaintaining -the head )ieee in engagement with the casing.r through nl'the sleeve whereby the sleeve' and heurl pire-e are prevented frommovingr back and forth.

5. ln a rellerting lnnip, the eolnhinution with a eelleetur rari-yin rcasing; of nu eirctriehnnp lutih; a shel carrying the lanip hulh at itsfront end:,ereentrieally disposed eouiplenientar'\Y switching;r routaetswithin the easing for euttinn' the lamp in and ont` ot eireuit: a plugmounted to turn in the shell to hare alternative positions to ent. theIzonp in and out ot' eirrnit and haring hayouet pin :ind slot engagementwith the sh'ell in the alternative positions ot' the plug: a rodeonneeted with said plug and projecting through the easing; a head pieeefor said rod upon the exterior ol the easing: and n springy iiferposedhetween the easing u'lul the piuel and entrngriln.r these parts toinnintaiu said head pieee in engagement with the exterior ol theeasing'.

V. ln a ieilerling' lump. the eonihination with n l'elleetor ea|'r \'in;r raising; oi' un eiern shell ea|'|' \'in,' the lalnp hulh at; its frontend: eeeentrically disposed eoniph-inenlari' switehilur rontaets withinthe easingr for cutting` the lump in nlul ont ot eireuit; a plug mountedto turn in the, -shell to ha i'e alternative positions and in netnatiugrelation to one of said .switching t-ontaets: a rnd runner-teil withsnid ping." nlul projet-tine' through the easing: a head piece t'or saidrod upon the exteriorot' tlu` easing: and n sprintl interposed het weenthey rnsinf: and the plu;r and engaging' these parts to maintain lsaidhead pieee ineugageinent with the exterior ol' tire ."using. i

'i'.4 ln a relier-ting electric iainp` the, couiliination with arellertor carri-"lng easing; boli); a Ishell carrying the lamp hnlh atits l'rmt end anrl having lwrv'fnet `pin und slot connection with thehase ot" the lamp hulh; eceent'rieally ,disposed switching contactswithin' the easing {oreutting the. lamp in and out of circuit; a pine'within the yasingl and mounted to turn in the shell to have alternativepositions to rut the iuinp in and out ot' circuit nml having bayonet;pin and slot eugragemel'lt with the shell in the alternative positionsofthe plug; a 'rod extending' from said ping and operable from theexterior of the rinsing loiturning: the ping: springs means for holdingsaid eontaets in engagement to esthe intermediation tahlish eircuit and`operating to hold the' tiff t1. .vntf.

the lump bulb nl, its front end; e conlnct carrying pluo' within thecasing and couple-rl with the tell for supplying current to thc lump undmounted to turn with re sport to the shell. to cut the lam in and out ofcircuit. there being engagea le eccentrieully located switching contactsin the lamp circuit, one upon the plug; u motion transmitting;r rodextending from the plugl and operable. from the exterior of the casingto turn said plug; u head piece for the rod; und u spring formniutuiniug the head piece in engagement with the casing.

9. In u reflecting electric lmnp, the com bi nul ion with n reflectorcarryingr casing; of :in electric lump bulb; a shell cnrryin the lumpbulb ut its front enrl nnrl having uyo net pin and slot connection withthe base of the lump bulb; eccentricnlly disposed switchingr contactswithin the casing for cutting the lump in and out of circuit; a plugwithin the casing and mounted to turn in the shell to have alternativepositions to cut the lamp in und out of circuit und having bayonet pinund slot engagement with the shell in the alternative positions of theplug; a rod extending Vfrom seid plug and operable from the exterior ofthe casin for turning the plug; spring Ineens for olding said contac-tsin engagement to establish circuit and operatingr to hold the plug incircuit open ing and circuit closing positions; c head piece for therod; a spring for maintaining the heart piece, in engagement with thecasingr` said rod 'being movable longitudinally :unl with respect to thehead piece and turn ing with the lieucl piece in its various posi tionswith respect thereto; and means operable from the exterior of the casingfor effecting movement of the shell and the lamp bulb in and out.

one upon the plug; a motion transmitting rofl extending from the plugand operable from the exterior of the casing to turn said plug; u hcnrlpiece for the rofl; a spring for maintaining the bend piece inengagement with the casing'. said rod being movable longitmlinully undwith respect to the head piece :intl turning with the head piece in itsrnrious positions with respect thereto; and means operable from theexterior of the Cusing for effecting movement of the shell and the lmnp'bulb in and out.

11. In e reflecting lamp, the combination with e reflector carryingcasing; of an electric lamp bulb. n shell carrying the lamp bulb at itsfront end; eccentrically disposed complementary switching contactswithin the casing` for cutting the lamp in and'out of circuit.; a plugmounted to turn in the shell to here alternative positions to eut thelmnp in und out of circuit; a rod con* necterl with said plug; n headpiece for said rofl upon the exterior of the casing; und n `springinterposed between the casing and the plug und engaging these parts tomain tuin suitl heed piece in engagement with the casing.

In witness whereof, I hereunto subscribe my name this 29th day ofJanuary A. D.,

l l HARRY A. DOUGLAS.

